Slips 2-3 Shift

1. Incorrect oil level.
2. Vacuum modulator valve sticking.
3. Vacuum modulator defective.
4. Pump pressure regulator valve defective.
5. Porosity between channels in case.
6. Control valve assembly.
7. Direct clutch plates burned.
8. Oil seal rings on direct clutch damaged, permitting excessive leaking between tower and bushing.